Unloader of activation furnace

Abstract

The invention provides an activation furnace unloader which comprises a shell, a first cavity and a second cavity which are communicated with each other are arranged in the shell, and the first cavity is vertically through; the striker plate is mounted in the shell in a sliding manner and can slide in the first cavity and the second cavity; the driving mechanism is connected with the striker plate through a pull rod and located outside the shell; the invention has the innovation points that a first sealing structure is arranged between the pull rod and the shell, the first sealing structure at least comprises a first sealing cavity surrounding the pull rod and a packing graphite sealing ring which is positioned in the first sealing cavity and sleeves the pull rod, and graphite sealing rings which sleeve the pull rod are arranged on two adjacent sides of the packing graphite sealing ring; and the end cover is used for sealing the first sealing cavity. The sealing effect of the activating furnace discharger can be effectively improved through the first sealing structure.

Description

Technical Field

[0001] The present invention relates to the technical field of activation furnace equipment, and in particular to an activation furnace unloader, which is particularly suitable for unloading materials that have undergone activation treatment in an activation furnace and can effectively improve the sealing performance of the activation furnace unloader. Background Art

[0002] Activation furnaces are commonly used in many industrial production fields, such as chemical processing and materials processing, to activate materials and modify their physical or chemical properties to meet specific production requirements. For example, in the production of activated carbon, an activation furnace is required to activate the carbonized material, giving it a well-developed pore structure and a large specific surface area, thereby achieving excellent adsorption properties.

[0003] After the activation furnace completes the material activation process, the activated material needs to be unloaded from the furnace for subsequent processing or packaging. Currently, traditional activation furnace unloading devices have poor sealing performance, which allows external air to enter the activation furnace, affecting the reaction atmosphere inside the activation furnace and the activation effect of the material. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the sealing performance of the existing activation furnace discharger is poor, which causes external air to enter the activation furnace, affecting the reaction atmosphere in the activation furnace and the activation effect of the material.

[0005] In order to solve the above problems, the present invention provides an activation furnace unloader, comprising: a shell, the shell comprising a first cavity and a second cavity that are connected, and the first cavity is connected from top to bottom; a baffle plate slidably installed in the shell and capable of sliding in the first cavity and the second cavity; a driving mechanism connected to the baffle plate through a pull rod, and the driving mechanism is located outside the shell; the innovation of the present invention is that a first sealing structure is arranged between the pull rod and the shell, and the first sealing structure at least comprises: a first sealing cavity surrounding the pull rod, a packing graphite sealing ring located in the first sealing cavity and sleeved on the pull rod, and graphite sealing rings sleeved on the pull rod are arranged on adjacent two sides of the packing graphite sealing ring; and also comprises an end cover for sealing the first sealing cavity.

[0006] In order to further improve the sealing effect between the end cover and the pull rod, as an improvement to the above activation furnace discharger, a plurality of first O-rings are further provided in the contact area between the pull rod and the end cover.

[0007] To further enhance the sealing performance of the activation furnace discharger, as an improvement to the aforementioned activation furnace discharger, a second sealing structure is provided on the exterior of the end cap. This second sealing structure comprises a plurality of interconnected second sealing cavities, at least one of which is connected to the air inlet. By introducing high-pressure inert gas into the air inlet, the activation furnace discharger can be sealed using a high-pressure gas curtain.

[0008] Optionally, the second sealing cavities located at both ends of the second sealing structure are respectively connected to air inlets.

[0009] In order to further improve the sealing effect of the second sealing structure during the movement of the pull rod, as an improvement of the above-mentioned activation furnace unloader of the present invention, the cross-section of the second sealing cavity is trapezoidal, and two triangular sealing rings with triangular cross-sections are arranged in the second sealing cavity. The two triangular sealing rings are arranged back to back, and the hypotenuse of the triangular sealing ring is in contact with the waist edge of the second sealing cavity.

[0010] Furthermore, the air inlets connected to the second sealing chambers at both ends of the second sealing structure open simultaneously; and / or, when the pull rod moves rightward, only the air inlet at the right end is ventilated, while the air inlet at the left end is closed; when the pull rod moves leftward, only the air inlet at the left end is ventilated, while the air inlet at the right end is closed. The high-pressure gas and back-to-back triangular sealing rings further enhance the sealing effect of the second sealing structure during rod movement.

[0011] Furthermore, a second O-ring is provided at the area where the two ends of the second sealing structure meet the pull rod. A gas pressure gauge is also provided outside the air inlet. A sealing sheet is provided at the area where the opening of the first cavity contacts the material retaining plate.

[0012] The technical effects of this application are: 1. In the present invention, the graphite packing seal is located in the first sealing cavity and is sleeved on the pull rod. The graphite packing seal has excellent sealing performance and high temperature resistance, can maintain a stable sealing effect in a high temperature environment, and effectively prevents gas leakage from the gap between the pull rod and the housing. Graphite sealing rings sleeved on the pull rod are respectively provided on both adjacent sides of the graphite packing seal. The graphite sealing ring further enhances the sealing effect. The soft texture of the graphite sealing ring can fill the tiny gap between the pull rod and the first sealing cavity, forming multiple sealing lines of defense, effectively preventing outside air from entering the activation furnace.

[0013] 2. In an optional solution of the present invention, the cross-section of the second sealed cavity is designed to be trapezoidal, and two triangular sealing rings with triangular cross-sections are arranged in the second sealed cavity, and the two triangular sealing rings are arranged back to back. The hypotenuse of the triangular sealing ring abuts against the waist edge of the second sealed cavity, so that the triangular sealing ring can fit tightly with the second sealed cavity, forming multiple sealing lines of defense. When the high-pressure inert gas enters the second sealed cavity, the gas pressure acts on the hypotenuse of the triangular sealing ring, causing it to produce elastic deformation, further fitting tightly on the waist edge of the second sealed cavity, thereby enhancing the sealing effect. At the same time, the two triangular sealing rings arranged back to back can form a two-way sealing structure. Even if there is a slight leak in the seal in one direction, the triangular sealing ring in the other direction can also play a blocking role, effectively preventing outside air from entering the activation furnace.

[0014] 3. In the present invention, when the pull rod starts to move to the right, due to the friction between the pull rod and the triangular sealing ring, the triangular sealing ring tends to move to the left. At this time, the gap between the triangular sealing ring on the right side of each second sealing cavity and the trapezoidal waist edge of the second sealing cavity will become larger, but the triangular sealing ring on the left side of the second sealing cavity can be in close contact with the trapezoidal waist edge of the second sealing cavity, thereby improving the sealing effect. However, since there is inevitably a gap between the triangular sealing ring and the pull rod, at this time, the right end air inlet is opened and the left end air inlet remains closed. The high-pressure gas passed into the right end air inlet can pass into the next second sealing cavity through these gaps. At the same time, due to the action of the high-pressure gas, the triangular sealing ring on the left side of each second sealing cavity will be promoted to be in closer contact with the trapezoidal waist edge of the second sealing cavity and the pull rod surface, further improving the sealing effect of the second sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the activation furnace discharger installation scenario; Figure 2 This is a schematic diagram of the axial side of the activation furnace discharger provided by the present application; Figure 3 This is a schematic axial cross-sectional view of an activation furnace discharger provided by the present application; Figure 4 It is a schematic top view of the activation furnace discharger provided by the present application; Figure 5 yes Figure 4 AA-direction cross-sectional view of the activation furnace discharger; Figure 6 This is a cross-sectional view of the second sealing structure of the activation furnace discharger provided by the present application; Figure 7 This is a schematic diagram of the second sealing structure when the pull rod moves to the right and the right air inlet is opened; Figure 8Schematic diagram of the second sealing structure when the pull rod moves to the left and the left air inlet is opened; Description of reference numerals: 100. Activation furnace unloader; 200. Activation furnace; 300. Discharge bin; 1. Housing; 11. First cavity; 12. Second cavity; 2. Baffle plate; 3. Pull rod; 4. Driving mechanism; 5. First sealing structure; 51. First sealing chamber; 52. Graphite packing seal; 53. Graphite seal; 54. End cap; 55. First O-ring seal; 6. Second sealing structure; 61. Second sealed cavity; 62. Air inlet; 63. Triangular sealing ring; 64. Second O-ring. DETAILED DESCRIPTION

[0016] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0017] The technical problem to be solved by the present invention is that the sealing performance of the existing activation furnace discharger is poor, which causes external air to enter the activation furnace, affecting the reaction atmosphere in the activation furnace and the activation effect of the material.

[0018] In order to solve the above problems, the present invention provides an activation furnace discharger 100, such as Figure 1 The figure shows an embodiment of the activation furnace discharger 100 of the present invention, which is arranged at the lower part of the cooling section of the activation furnace 200 and is used to discharge the activated material from the cooling section to the discharge bin 300. Figure 2~Figure 3 The activation furnace discharger 100 includes a housing 1, a material blocking plate 2, a pull rod 3, and a drive mechanism 4. The housing 1 includes a first cavity 11 and a second cavity 12 that are connected. The first cavity 11 is a vertically through-hole structure, allowing materials to be discharged through the first cavity 11 when the material blocking plate 2 cannot block the first cavity 11.

[0019] The baffle plate 2 is slidably mounted within the housing 1 and is able to slide freely within the first cavity 11 and the second cavity 12. When unloading is required, the drive mechanism 4 drives the baffle plate 2 to slide from the first cavity 11 to the second cavity 12. At this time, due to the effect of gravity, the material can be smoothly discharged from the first cavity 11 to the discharge bin 300. When unloading is not required, the drive mechanism 4 drives the baffle plate 2 to slide from the second cavity 12 to the first cavity 11, and the baffle plate 2 will block the vertical opening of the first cavity 11, thereby preventing the material from continuing to fall and stopping the unloading.

[0020] Drive mechanism 4 is located outside housing 1 and connected to retaining plate 2 via tie rod 3. Drive mechanism 4 can take various forms, such as an electric push rod, hydraulic cylinder, or pneumatic cylinder, and its function is to provide the motive force for the sliding of retaining plate 2. Tie rod 3 and retaining plate 2 are securely connected using a threaded or welded connection to prevent loosening during long-term use, which could affect the proper functioning of the unloader.

[0021] Reference Figure 4~Figure 5 To address the poor sealing performance of existing dischargers, the present invention incorporates a first sealing structure 5 between the tie rod 3 and the housing 1. This first sealing structure 5 comprises a first sealing chamber 51, a graphite packing seal 52, a graphite sealing ring 53, and an end cap 54. The first sealing chamber 51 is disposed on the housing 1 and surrounds the tie rod 3, providing space for the sealing components. The graphite packing seal 52 is located within the first sealing chamber 51 and fits over the tie rod 3. The graphite packing seal 52 offers excellent sealing performance and high-temperature resistance, maintaining a stable seal at high temperatures and effectively preventing gas leakage from the gap between the tie rod 3 and the housing 1. Two graphite sealing rings 53 are provided on either side of the graphite packing seal 52, each fitted over the tie rod 3. These graphite sealing rings 53 further enhance the sealing effect. Their soft texture fills the tiny gap between the tie rod 3 and the first sealing chamber 51, forming multiple sealing lines that effectively prevent outside air from entering the activation furnace. The end cover 54 is used to seal the first sealed cavity 51 . The end cover 54 is firmly connected to the housing 1 by bolts or other connection methods to ensure the sealing of the first sealed cavity 51 .

[0022] During actual operation, when the material in the activation furnace 200 needs to be unloaded, the drive mechanism 4 drives the retaining plate 2 to slide into the second cavity 12 via the pull rod 3, and the material is discharged from the first cavity 11 into the discharge bin 300. At this time, the first sealing structure 5 effectively prevents external air from entering the furnace through the gap between the pull rod 3 and the shell 1, ensuring the reaction atmosphere in the activation furnace and the activation effect of the material. When unloading is completed, the drive mechanism 4 drives the retaining plate 2 to slide back into the first cavity 11, blocking the upper and lower through-ports of the first cavity 11, and stopping unloading.

[0023] The activation furnace discharger 100 of the present invention effectively solves the problem of poor sealing performance of the existing activation furnace discharger by providing the first sealing structure 5 .

[0024] Continue to refer to Figure 5In addition to the first sealing structure 5 described in the above embodiment, several first O-rings 55 are installed in the contact area between the tie rod 3 and the end cap 54. Made of rubber and with a circular cross-section, the first O-rings 55 fit tightly around the tie rod 3 and closely adhere to the inner wall of the end cap 54. The number of first O-rings 55 can be appropriately adjusted based on the actual sealing requirements and operating environment; typically, two to three are provided to create multiple sealing lines and enhance the sealing effect. When the activation furnace discharger 100 is in operation, the tie rod 3 reciprocates under the action of the drive mechanism 4. During this movement of the tie rod 3, the first O-rings 55, due to their inherent elasticity, maintain a tight fit between the tie rod 3 and the end cap 54. As the tie rod 3 moves, the first O-rings 55 elastically deform, filling the slight gap between the contact surface of the tie rod 3 and the end cap 54, preventing gas from leaking through the gap and preventing outside air from entering the activation furnace.

[0025] The first O-ring 55 cooperates with the packing graphite sealing ring 52 and the graphite sealing ring 53 in the original first sealing structure 5 to form a multi-layered sealing system.

[0026] Continue to refer to Figures 6 to 8 On the basis of the above embodiments, in some preferred embodiments, an annular second sealing structure 6 is provided on the outside of the end cover 54 of the activation furnace discharger 100. The second sealing structure 6 is installed on the outside of the end cover 54 and surrounds the outer circumference of the pull rod 3. One end of the second sealing structure 6 is firmly connected to the shell 1 by bolts or other connection methods. The second sealing structure 6 is composed of a plurality of second sealing cavities 61. Adjacent second sealing cavities 61 are connected by an annular channel to form an overall sealed space, wherein at least one second sealing cavity 61 is equipped with an air inlet 62, and a gas pressure gauge is provided outside the air inlet 62. The air inlet 62 is connected to an external high-pressure inert gas source to provide high-pressure inert gas input to the second sealing cavity 61, thereby realizing sealing using high-pressure inert gas. The second sealing cavity 61 is generally arranged as a 3 to 6 annular structure, and the connecting channel between each second sealing cavity 61 is narrow, thereby ensuring the pressure balance of the entire second sealing structure 6 and the stability of the sealing effect.

[0027] The high-pressure inert gas introduced through the air inlet 62 is usually nitrogen or argon, preferably nitrogen. When the high-pressure inert gas enters the second sealed cavity 61 through the air inlet 62, since the sealed cavities are interconnected, the gas will gradually fill the entire second sealed structure 6, and establish a positive pressure environment higher than the pressure in the activation furnace and the external atmospheric pressure in the sealed area, forming an invisible air curtain barrier, which effectively prevents the high-temperature gas in the activation furnace from leaking out, and also prevents impurities such as oxygen and moisture in the outside air from entering the activation furnace, avoiding adverse effects on the activation reaction. On the other hand, the high-pressure inert gas can take away part of the heat generated by components such as the end cover 54 and the pull rod 3 during operation during the flow process, play a certain cooling role, help reduce the temperature of the sealing components, and extend the service life of the sealing components.

[0028] Continue to refer to Figures 6 to 8 In some preferred embodiments, air inlets 62 are provided in the second sealed cavity 61 at both ends of the second sealing structure 6. When high-pressure inert gas is introduced simultaneously through the air inlets 62 at both ends of the second sealing structure 6, the gas can diffuse bidirectionally toward the central second sealed cavity 61. Compared to introducing gas from only one air inlet, introducing air from both ends shortens the time it takes for the gas to fill the entire second sealing structure 6. Furthermore, the tie rod 3 reciprocates during operation of the activation furnace discharger 100, which can affect the sealing performance of the second sealing structure 6. This two-end air inlet arrangement allows for more rapid adjustment of the gas pressure and distribution within the second sealed cavity 61 during tie rod movement to accommodate changes in the sealing gap caused by tie rod movement. For example, when the tie rod moves, the gas pressure at one end of the second sealing structure 6 decreases slightly due to the movement of the tie rod. At this time, the air inlet 62 at that end, under the action of a pressure regulating valve, increases the gas flow rate, rapidly replenishing gas and restoring the sealing pressure. Simultaneously, the air inlet 62 at the other end also adjusts the gas flow rate accordingly based on the system pressure balance principle, jointly ensuring stable sealing performance.

[0029] Continue to refer to Figures 6 to 8 In some preferred embodiments, the second sealed cavity 61 has a trapezoidal cross-section, and two triangular sealing rings 63 with triangular cross-sections are disposed within the second sealed cavity 61. The two triangular sealing rings 63 are arranged back-to-back, with the hypotenuses of the triangular sealing rings 63 abutting the waist of the second sealed cavity 61. When the pull rod moves to the right, only the air inlet 62 at the right end is ventilated, while the air inlet 62 at the left end is closed. When the pull rod moves to the left, only the air inlet 62 at the left end is ventilated, while the air inlet 62 at the right end is closed.

[0030] Specifically, the second sealing cavity 61 adopts a trapezoidal cross-section design, with the long base of the trapezoid mateable with the tie rod 3. During movement of the tie rod 3, the waist of the trapezoid creates a more even pressure distribution on the triangular sealing ring 63, ensuring closer contact between the triangular sealing ring 63, the tie rod 3, and the inner wall of the second sealing cavity 61, thereby effectively improving sealing performance and preventing gas leakage. Both triangular sealing rings 63 are designed with a triangular cross-section and are made of a rubber material that is elastic, heat-resistant, and corrosion-resistant, such as fluororubber. The three sides of the triangular sealing ring 63 each have a different function: the hypotenuse contacts the waist of the second sealing cavity 61, while one of the right-angled sides contacts the tie rod. The two triangular sealing rings 63 are arranged back-to-back within the second sealing cavity 61. This back-to-back arrangement of the two triangular sealing rings 63 creates a relatively closed, sealed space that effectively prevents furnace gas or external air from leaking through the gap between the tie rod 3 and the second sealing cavity 61.

[0031] For example, referring to Figure 7-Figure 8 , the solid arrow indicates the flow direction of the high-pressure inert gas, and the dotted arrow indicates the moving direction of the pull rod 3. When the pull rod 3 starts to move to the right, due to the friction between the pull rod and the triangular sealing ring 63, the triangular sealing ring 63 tends to move to the left. At this time, the gap between the triangular sealing ring 63 on the right side of each second sealing cavity 61 and the trapezoidal waist edge of the second sealing cavity 61 will become larger, but the triangular sealing ring 63 on the left side of the second sealing cavity 61 can be in close contact with the trapezoidal waist edge of the second sealing cavity 61, thereby improving the sealing effect. However, since there will inevitably be a gap between the triangular sealing ring 63 and the pull rod 3, at this time, the right end air inlet 62 is opened and the left end air inlet 62 remains closed. The high-pressure gas entering the right end air inlet 62 can pass through these gaps to the next second sealing cavity 61. At the same time, due to the action of the high-pressure gas, the triangular sealing ring 63 on the left side of each second sealing cavity 61 will be promoted to be in closer contact with the trapezoidal waist edge of the second sealing cavity 61 and the pull rod surface, further improving the sealing effect of the second sealing structure 6.

[0032] Figure 8 The diagram shows the direction of high pressure gas flow and the sealing state of the triangular sealing ring 63 in each second sealing cavity 61 when the pull rod moves to the left and closes the right end air inlet 62 and opens the left end air inlet. Figure 7 On the contrary, no further details will be given here.

[0033] Continue to refer to Figures 6-8 In some embodiments, a second O-ring 64 is provided at the area where the two ends of the second sealing structure meet the pull rod 3. The second O-ring 64 is installed in the sealing groove and achieves the sealing function by its own elastic deformation.

[0034] In some embodiments, a sealing sheet is provided around the entire perimeter of the opening of the first cavity 11 that contacts the material retaining plate 2. Specifically, the upper and lower edges, left and right edges, and all other areas of the opening of the first cavity 11 that may come into contact with the material retaining plate 2 are covered with a sealing sheet to ensure a complete seal and prevent gas or material from leaking from these contact areas.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An activation furnace discharger, comprising: A shell (1), wherein the shell (1) includes a first cavity (11) and a second cavity (12) that are connected to each other, and the first cavity (11) is connected from top to bottom; a baffle plate (2) slidably mounted in the shell (1) and capable of sliding in the first cavity (11) and the second cavity (12); a driving mechanism (4) connected to the baffle plate (2) via a pull rod (3), and the driving mechanism (4) is located outside the shell (1); It is characterized in that a first sealing structure (5) is provided between the pull rod (3) and the housing (1), and the first sealing structure (5) at least comprises: A first sealing cavity (51) surrounding the pull rod (3) is located in the first sealing cavity (51), and a packing graphite sealing ring (52) is sleeved on the pull rod, and graphite sealing rings (53) sleeved on the pull rod are provided on adjacent two sides of the packing graphite sealing ring (52); and an end cover (54) for sealing the first sealing cavity (51).

2. The activation furnace discharger according to claim 1, characterized in that: The area where the pull rod (3) contacts the end cover (54) is also covered with a plurality of first O-type sealing rings (55).

3. The activation furnace discharger according to claim 1, characterized in that: A second sealing structure (6) is further provided outside the end cover (54), and the second sealing structure (6) comprises: a plurality of interconnected second sealing cavities (61), wherein at least one of the second sealing cavities (61) is connected to the air inlet (62).

4. The activation furnace discharger according to claim 3, characterized in that: The second sealing cavities (61) located at both ends of the second sealing structure (6) are respectively connected to air inlets (62).

5. The activation furnace discharger according to claim 4, characterized in that: The air inlets (62) connected to the second sealing cavities (61) located at both ends of the second sealing structure (6) are opened simultaneously; and / or, When the pull rod moves to the right, only the air inlet (62) at the right end is ventilated, and the air inlet (62) at the left end is closed; when the pull rod moves to the left, only the air inlet (62) at the left end is ventilated, and the air inlet (62) at the right end is closed.

6. The activation furnace discharger according to claim 4 or 5, characterized in that: The cross section of the second sealing cavity (61) is trapezoidal, and two triangular sealing rings (63) with triangular cross sections are arranged in the second sealing cavity (61). The two triangular sealing rings (63) are arranged back to back, and the hypotenuse of the triangular sealing ring (63) abuts against the waist edge of the second sealing cavity (61).

7. The activation furnace discharger according to claim 5, characterized in that: A second O-ring (64) is provided in the area where the two ends of the second sealing structure connect with the pull rod (3).

8. The activation furnace discharger according to claim 5, characterized in that: A gas pressure gauge is also provided outside the air inlet (62).

9. The activation furnace discharger according to claim 1, characterized in that: Sealing sheets are provided at the areas where the opening of the first cavity (11) and the material blocking plate (2) contact each other.

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